TRONCHE ALLEE VERTE MEYLAN BUCLOS CORENC MONTFLEURY · Le Sappey-en-Chartreuse
GRENOBLE ALPES METROPOLE
Water safety
Water safety
Parameter
Unfiltered tap water
Allowed range
Filtered
Free Chlorinemg CL2/l
0.05 ● (Near the limit)
0.2 – 1
0.001 ▲
Total Chlorinemg CL2/l
0.05
No limit
0.01
General
General
Parameter
Unfiltered tap water
Allowed range
Filtered
TemperatureC
25.1
No limit
25.1
Hardnessmg CaCO3/l
180.2
80 – 459
180.2
Hardness fF
18
No limit
18
pH
7.5
6.5 – 9.5
7.5
TurbidityNTU
0.11
≤ 4
0.011
ColorColor Units
5
≤ 15
5
ConductivityμS / cm
369
≤ 2,500
369
TDSmg/l
236.2estimated
0 – 1,199
236.2
Alkalinitymg CaCO3/l
157.5
No limit
157.5
Pathogens
Pathogens
Parameter
Unfiltered tap water
Allowed range
Filtered
ClostridiumUFC/100ml
0
≤ 0
0
eColiUFC/100ml
0
≤ 0
0
BacteriasNMP/100ml
0
≤ 0
0
EnterococcusUFC/100ml
0
≤ 0
0
Chemical parameters
Chemical parameters
Parameter
Unfiltered tap water
Allowed range
Filtered
Cyanide totalμg CN/l
10Sampled Apr 2026
≤ 50
0.5
Fluoridemg F/l
0.11Sampled Apr 2026
≤ 1.5
0.033
Mercuryμg Hg/l
0.01Sampled Apr 2026
≤ 1
0.001
Nitritesmg NO2/l
0.01
≤ 0.5
0.004
Nitratesmg NO3/l
2.7
≤ 50
0.81
Minerals
Minerals
Parameter
Unfiltered tap water
Allowed range
Filtered
Magnesiummg/l
6.8Sampled Apr 2026
No limit
6.8
Calciummg/l
54.4Sampled Apr 2026
No limit
54.4
Potassiummg/l
0.7Sampled Apr 2026
No limit
0.7
Chloridemg/l
4.4
≤ 250
4.4
Metals
Metals
Parameter
Unfiltered tap water
Allowed range
Filtered
Aluminiumμg/l
13Sampled Apr 2026
≤ 200
13
Antimonyμg/l
1Sampled Apr 2026
≤ 5
1
Arsenicμg/l
2Sampled Apr 2026
≤ 10
1
Bariumμg/l
38Sampled Apr 2026
≤ 1,000
38
Cadmiumμg/l
1Sampled Apr 2026
≤ 5
1
Chromiumμg/l
5Sampled Apr 2026
≤ 50
5
Copperμg/l
10Sampled Apr 2026
≤ 2,000
0.5
Ironμg/l
44Sampled Apr 2026
≤ 200
44
Manganeseμg/l
10Sampled Apr 2026
≤ 50
10
Leadμg/l
2Sampled Apr 2026
≤ 10
0.1
Nickelμg/l
5Sampled Apr 2026
≤ 20
5
Seleniumμg/l
2Sampled Apr 2026
≤ 10
2
Sodiummg/l
4.4Sampled Apr 2026
≤ 200
4.4
Chlorine by-products
Chlorine by-products
Parameter
Unfiltered tap water
Allowed range
Filtered
Trichloroethyleneμg/l
0.1Sampled Apr 2026
No limit
0.005
Total Trihalomethanesμg/l
0.5Sampled Nov 2025
≤ 100
0.025
Pesticides
Pesticides
Parameter
Unfiltered tap water
Allowed range
Filtered
Heptachlorug/L
0.005Sampled Apr 2026
≤ 0.4
0.005
Total pesticidesug/L
0.049Sampled Apr 2026
≤ 0.5
0.049
Herbicides
Herbicides
Parameter
Unfiltered tap water
Allowed range
Filtered
D 2 4ug/L
0.02Sampled Apr 2026
≤ 70
0.02
Atrazineug/L
0.005Sampled Apr 2026
≤ 3
0.005
Perfluorinated chemicals
Perfluorinated chemicals
Parameter
Unfiltered tap water
Allowed range
Filtered
PFOAug/L
0.001Sampled Apr 2026
No limit
0.001
PFOSug/L
0.001Sampled Apr 2026
No limit
0.001
PFNAug/L
0.001Sampled Apr 2026
No limit
0.001
Total PFASug/L
0.002Sampled Apr 2026
≤ 0.1
0
PFAS 4ng/l
Not reported
No limit
—
PFAS 21ng/l
Not reported
No limit
—
Other
Other
Parameter
Unfiltered tap water
Allowed range
Filtered
Ammoniamg/l
0.01
No limit
0.003
Perchlorateug/L
0.13Sampled Nov 2025
No limit
0.13
Sulfatemg/l
38.2
No limit
38.2
Uraniumug/L
10Sampled Apr 2026
No limit
10
Data from the French health inspection of drinking water (Ministry of Health, regional health agencies), per distribution unit. Quality ranges are based on WHO guidelines, EU Directive 2020/2184 and the French public health code.
